在两个日期之间选择 php mysql [重复]

Question

我有一个非常简单的 SQL，让我发疯。 我正在与 Car Rental 合作 - 所以有一个 FromDate 和一个 ToDate（预订的汽车）

我的 MySQL 是这样的：

id | FromDate | ToDate
-----------------------
24 | 01.10.2020 | 31.10.2020

因此，如果用户在这两者之间选择一个日期，他应该会收到汽车已被预订的消息。到目前为止我所尝试的：

SELECT id FROM booked_cars WHERE ($fromdate BETWEEN date(FromDate) AND date(ToDate)) AND vhId = $vhid
SELECT id FROM booked_cars WHERE ($fromdate BETWEEN date(FromDate) AND date(ToDate) AND $todate BETWEEN date(FromDate) AND date(ToDate)) AND vhId = $vhid
SELECT id FROM booked_cars WHERE (date(FromDate) BETWEEN $fromdate AND $todate) AND vhId = $vhid

我的 $fromdate、$todate 和 $vhid 带有一个 POST-Form。 价值观是

$fromdate = 03.10.2020
$todate = 07.10.2020
$vhid = 24

无论我尝试什么，我的 $statement->rowCount() 总是为零。

我正在使用带有准备好的语句的 PDO。我只是为了更好的阅读而写的。

$statement = $pdo->prepare("SELECT id FROM booked_cars WHERE (:fromdate BETWEEN date(FromDate) AND date(ToDate)) AND vhId = :vhid");
$statement->execute(array('fromdate' => $fromdate, 'vhid' => $vhid));
echo $statement->rowCount(); // Alway 0 with BETWEEN (when i select just the vhid, i got the result)

Answer 1

您需要在这里使用STR_TO_DATE，数据库中保存的日期很可能是YYYY-mm-dd 格式。

$statement = $pdo->prepare("SELECT `id` FROM `booked_cars` WHERE `vhId` = :vhid AND STR_TO_DATE(:fromdate,'%d.%m.%Y') BETWEEN `FromDate` AND `ToDate`;");

如果字段FromDate 和ToDate 类型为DATETIME：

$statement = $pdo->prepare("SELECT `id` FROM `booked_cars` WHERE `vhId` = :vhid AND STR_TO_DATE(:fromdate,'%d.%m.%Y') BETWEEN DATE(`FromDate`) AND DATE(`ToDate`);");

上述查询与DB Fiddle example 中使用的查询类似。